crc32: Enable debug logs of timing *and throughput* in both impls

* qCRC is a way to benchmark SWD throughput from inside BMF
* For sufficiently long sections also compute KiB/s

src/crc32.c

@@ -132,7 +132,14 @@ bool generic_crc32(target_s *const target, uint32_t *const result, const uint32_
 		for (size_t i = 0; i < read_len; i++)
 			crc = crc32_calc(crc, bytes[i]);
 	}
-	DEBUG_WARN("%" PRIu32 " ms\n", platform_time_ms() - start_time);
+#if ENABLE_DEBUG == 1
+	const uint32_t end_time = platform_time_ms();
+	if (len > 512U) {
+		const uint32_t speed = len * 1000U / (end_time - start_time) / 1024U;
+		DEBUG_INFO("%s: len = %" PRIu32 ": %" PRIu32 " KiB/s,\t", __func__, (uint32_t)len, speed);
+	}
+	DEBUG_INFO("%" PRIu32 " ms\n", end_time - start_time);
+#endif
 	*result = crc;
 	return true;
 }
@@ -149,6 +156,9 @@ bool stm32_crc32(target_s *const target, uint32_t *const result, const uint32_t
 
 	CRC_CR |= CRC_CR_RESET;
 
+#if ENABLE_DEBUG == 1
+	const uint32_t start_time = platform_time_ms();
+#endif
 	uint32_t last_time = platform_time_ms();
 	const size_t adjusted_len = len & ~3U;
 	for (size_t offset = 0; offset < adjusted_len; offset += sizeof(bytes)) {
@@ -185,6 +195,14 @@ bool stm32_crc32(target_s *const target, uint32_t *const result, const uint32_t
 			}
 		}
 	}
+#if ENABLE_DEBUG == 1
+	const uint32_t end_time = platform_time_ms();
+	if (len > 512U) {
+		const uint32_t speed = len * 1000U / (end_time - start_time) / 1024U;
+		DEBUG_INFO("%s: len = %" PRIu32 ": %" PRIu32 " KiB/s,\t", __func__, (uint32_t)len, speed);
+	}
+	DEBUG_INFO("%" PRIu32 " ms\n", end_time - start_time);
+#endif
 	*result = crc;
 	return true;
 }